Influence of coating thickness on the impact damage mode in Fe-based amorphous coatings

doi:10.1016/j.surfcoat.2020.125650

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	Influence of coating thickness on the impact damage mode in Fe-based amorphous coatings
	Guo, H.1,2,3; Wu, N. C.1,4; Zhang, Y. L.3; Zhang, S. D.1; Sun, W. H.1; Wang, J. Q.1
刊名	SURFACE & COATINGS TECHNOLOGY
	2020-05-25
卷号	390 页码:15
关键词	Fe-based amorphous coating X-ray tomography Impact damage mechanism Maximum shear stress Coating thickness
ISSN号	0257-8972
DOI	10.1016/j.surfcoat.2020.125650
通讯作者	Wang, J. Q.(jqwang@imr.ac.cn)
英文摘要	The impact behavior of Fe-based amorphous coatings with various thicknesses fabricated by high-velocity-airfuel thermal spraying was systematically investigated via 3D X-ray tomography. The results showed that the impact damage occurred principally by cracking in the coating, plastic deformation in the substrate, and delamination at the coating/substrate interface. It was found that the size of the interfacial delamination was a nonlinear function of the normalized coating thickness t(c)/a (i.e. the ratio of coating thickness (t(c)) to the contact radius (a)). Three thickness regions of distinctive damage modes were identified: thin coating region (t(c)/a <= 0.33), intermediate-thickness region (0.33 < t(c)/a <= 0.54), and thick coating region (t(c)/a > 0.54). For t(c)/a <= 0.33, no delamination appeared in the coating/substrate interface. With an increase from t(c)/a = 0.33 to t(c)/a = 0.54, the extent of interfacial delamination increased quickly and reached a maximum. Finally, when t(c)/a > 0.54, the extent of delamination decreased when t(c)/a increased. In addition, it was indicated that the residual stress was found to decrease with the coating thickness, reflecting that the residual stress was excluded as a predominant factor of impact damage. Furthermore, a good agreement with the Hertz impact theory and finite element modeling was identified in the case of interfacial damage: significant delamination was observed in the 600 mu m coating when the maximum shear stress occurred close to the coating/substrate interface. This finding can be used to assist the design of coated components in load-bearing applications.
资助项目	National Key Research and Development Program of China[2016YFB1100204] ; National Natural Science Foundation of China[51701090] ; National Natural Science Foundation of China[51701214] ; National Natural Science Foundation of China[U1908219] ; Natural Science Foundation of Jiangxi Academy of Sciences[2018-XTPH1-12] ; Natural Science Foundation of Jiangxi Academy of Sciences[2018-YYB-12] ; Key Research Project of Jiangxi Academy of Sciences[2020-YZD-18]
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000532675100003
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Natural Science Foundation of Jiangxi Academy of Sciences ; Key Research Project of Jiangxi Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/138722]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, J. Q.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Jiangxi Acad Sci, Inst Appl Phys, Nanchang 330012, Jiangxi, Peoples R China 4.Liaoning Shihua Univ, Sch Mech Engn, Fushun 113001, Peoples R China
推荐引用方式 GB/T 7714	Guo, H.,Wu, N. C.,Zhang, Y. L.,et al. Influence of coating thickness on the impact damage mode in Fe-based amorphous coatings[J]. SURFACE & COATINGS TECHNOLOGY,2020,390:15.
APA	Guo, H.,Wu, N. C.,Zhang, Y. L.,Zhang, S. D.,Sun, W. H.,&Wang, J. Q..(2020).Influence of coating thickness on the impact damage mode in Fe-based amorphous coatings.SURFACE & COATINGS TECHNOLOGY,390,15.
MLA	Guo, H.,et al."Influence of coating thickness on the impact damage mode in Fe-based amorphous coatings".SURFACE & COATINGS TECHNOLOGY 390(2020):15.